[ 35.439669] audit: type=1800 audit(1551833262.458:28): pid=7474 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 36.112097] audit: type=1800 audit(1551833263.188:29): pid=7474 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 36.131742] audit: type=1800 audit(1551833263.188:30): pid=7474 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 [....] startpar: service(s) returned failure: rsyslog ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.234' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.634203] kasan: CONFIG_KASAN_INLINE enabled [ 45.638942] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.646291] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.652507] CPU: 0 PID: 7649 Comm: syz-executor896 Not tainted 5.0.0+ #7 [ 45.659332] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.668696] RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 [ 45.673954] Code: ea 03 80 3c 02 00 0f 85 a2 00 00 00 48 8b 5b 08 e8 62 20 ee fa 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 53 4c 8b 6b 30 4c 89 e7 49 83 ed 18 4c 89 ee e8 b4 [ 45.692839] RSP: 0018:ffff8880964ff040 EFLAGS: 00010206 [ 45.698183] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8679cd9f [ 45.705436] RDX: 0000000000000006 RSI: ffffffff8681c41e RDI: 0000000000000030 [ 45.712694] RBP: ffff8880964ff058 R08: ffff888090868700 R09: 0000000000000002 [ 45.719943] R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffff88808e65f1e0 [ 45.727193] R13: ffff88808e65eac0 R14: dffffc0000000000 R15: ffff8880964ff198 [ 45.734444] FS: 0000000001674880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 45.742669] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.748551] CR2: 0000000020000080 CR3: 000000008dcac000 CR4: 00000000001406f0 [ 45.755817] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.763414] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.770666] Call Trace: [ 45.773243] sctp_outq_flush+0xba2/0x2790 [ 45.777394] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 45.782832] ? sctp_chunkify+0x4b/0x290 [ 45.786802] ? __sctp_outq_teardown+0xc60/0xc60 [ 45.791457] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 45.796972] ? sctp_outq_tail+0x681/0x930 [ 45.801106] sctp_outq_uncork+0x6c/0x80 [ 45.805063] sctp_do_sm+0x513/0x5390 [ 45.808757] ? __lock_acquire+0x53b/0x4700 [ 45.812975] ? __sys_sendmsg+0x105/0x1d0 [ 45.817028] ? sctp_do_8_2_transport_strike.isra.0+0x940/0x940 [ 45.822991] ? mark_held_locks+0x100/0x100 [ 45.827226] ? sctp_assoc_bh_rcv+0x2fc/0x660 [ 45.831622] ? find_held_lock+0x35/0x130 [ 45.835666] ? sctp_assoc_bh_rcv+0x2fc/0x660 [ 45.840067] ? kvm_clock_read+0x18/0x30 [ 45.844032] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.849034] ? ktime_get+0x208/0x300 [ 45.852736] sctp_assoc_bh_rcv+0x343/0x660 [ 45.856955] sctp_inq_push+0x1ea/0x290 [ 45.860825] sctp_backlog_rcv+0x189/0xbc0 [ 45.864955] ? __local_bh_enable_ip+0x15a/0x270 [ 45.869608] ? sctp_hash_obj+0x5e0/0x5e0 [ 45.873659] ? __release_sock+0xca/0x3a0 [ 45.877720] ? __local_bh_enable_ip+0x15a/0x270 [ 45.882379] __release_sock+0x12e/0x3a0 [ 45.886352] release_sock+0x59/0x1c0 [ 45.890061] sctp_wait_for_connect+0x316/0x540 [ 45.894643] ? sctp_get_port+0x180/0x180 [ 45.898692] ? finish_wait+0x260/0x260 [ 45.902559] ? sctp_datamsg_put+0x36/0x4d0 [ 45.906775] ? sctp_primitive_SEND+0xa0/0xd0 [ 45.911186] sctp_sendmsg_to_asoc+0x13e2/0x17d0 [ 45.915839] ? sctp_clear_owner_w+0x120/0x120 [ 45.920315] ? sctp_autobind+0x1f0/0x1f0 [ 45.924359] ? lock_downgrade+0x810/0x810 [ 45.928509] ? kasan_check_read+0x11/0x20 [ 45.932672] sctp_sendmsg+0x10a9/0x17e0 [ 45.936635] ? sctp_id2assoc+0x2c0/0x2c0 [ 45.940681] ? __might_sleep+0x95/0x190 [ 45.944638] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 45.949558] ? aa_sk_perm+0x1c6/0x7c0 [ 45.953356] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 45.958184] inet_sendmsg+0x147/0x5d0 [ 45.961968] ? ipip_gro_receive+0x100/0x100 [ 45.966272] sock_sendmsg+0xdd/0x130 [ 45.969966] ___sys_sendmsg+0x806/0x930 [ 45.973928] ? copy_msghdr_from_user+0x430/0x430 [ 45.978683] ? _raw_spin_unlock_bh+0x31/0x40 [ 45.983083] ? release_sock+0x158/0x1c0 [ 45.987040] ? sctp_setsockopt+0x165/0x68a0 [ 45.991348] ? sctp_setsockopt_paddr_thresholds+0x540/0x540 [ 45.997051] ? lockdep_hardirqs_on+0x415/0x5d0 [ 46.001619] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 46.006555] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.012134] ? __fget_light+0x1a9/0x230 [ 46.016095] ? __fdget+0x1b/0x20 [ 46.019440] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.024961] __sys_sendmsg+0x105/0x1d0 [ 46.028831] ? __ia32_sys_shutdown+0x80/0x80 [ 46.033223] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 46.037959] ? do_syscall_64+0x26/0x610 [ 46.041918] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.047273] ? do_syscall_64+0x26/0x610 [ 46.051248] __x64_sys_sendmsg+0x78/0xb0 [ 46.055299] do_syscall_64+0x103/0x610 [ 46.059180] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.064368] RIP: 0033:0x440159 [ 46.067566] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 46.086456] RSP: 002b:00007ffc42177718 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 46.094182] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440159 [ 46.101441] RDX: 0000000000000000 RSI: 000000002001afc8 RDI: 0000000000000003 [ 46.108691] RBP: 00000000006ca018 R08: 0000000000000002 R09: 00000000004002c8 [ 46.115947] R10: 0000000000000008 R11: 0000000000000246 R12: 00000000004019e0 [ 46.123200] R13: 0000000000401a70 R14: 0000000000000000 R15: 0000000000000000 [ 46.130455] Modules linked in: [ 46.133766] ---[ end trace 799ac81cbeb74c97 ]--- [ 46.138665] RIP: 0010:sctp_sched_rr_dequeue+0xd3/0x170 [ 46.143932] Code: ea 03 80 3c 02 00 0f 85 a2 00 00 00 48 8b 5b 08 e8 62 20 ee fa 48 8d 7b 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 53 4c 8b 6b 30 4c 89 e7 49 83 ed 18 4c 89 ee e8 b4 [ 46.163056] RSP: 0018:ffff8880964ff040 EFLAGS: 00010206 [ 46.168444] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8679cd9f [ 46.175717] RDX: 0000000000000006 RSI: ffffffff8681c41e RDI: 0000000000000030 [ 46.183013] RBP: ffff8880964ff058 R08: ffff888090868700 R09: 0000000000000002 [ 46.190304] R10: ffffed1015d05bcf R11: ffff8880ae82de7b R12: ffff88808e65f1e0 [ 46.197566] R13: ffff88808e65eac0 R14: dffffc0000000000 R15: ffff8880964ff198 [ 46.204875] FS: 0000000001674880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 46.213134] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.219038] CR2: 0000000020000080 CR3: 000000008dcac000 CR4: 00000000001406f0 [ 46.226315] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.233620] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.240942] Kernel panic - not syncing: Fatal exception [ 46.247159] Kernel Offset: disabled [ 46.250802] Rebooting in 86400 seconds..